Unit ventilator



Patented May 27, 1930 PATENT OFFICE HARRY w. PAGE, OI WA'UWATOBA WISCONSIN trim: vnnrmrora Application filed October 21, 1927. Sqflal no. 227,860.

invention and of its objects and advantages,

reference maybe had to the following detailed description taken in connection with the accompanying drawings, wherein:

Figure 1 is a front elevation of a ventilating unit embodying the present invention; Fig. 2 is a view of the unit, partly in end elevation and partly in section, on a larger scale than Fig. 1; Fig. 3 is an end view of the lower portion of the unit, on the same scale as Fig. 2;

Fig. 4 is a view, partly in front elevation, and

partly in section, showing a modification Fig. 5 is a section taken approximatelly on line 55 of Fig. 4:; and Fig. 6 is a view, partly in front elevation, and partly in section, showing amodification.

Referring to Figures 1 to 8 of the drawings, 1 represents a closed casing having at the top a suitable outlet, conveniently in the form of a grid or grating 2. "in the upper part of the casing is a radiator 3. Below the radiator is a suitable blower 4 adapted to draw air from within the bottom of the casing and force it up past the radiator. All of the parts heretofore described may take any of the usual or preferred forms; the construction shown being simply for the purpose of illustrating my invention.

The unit, as is customary, is adapted to be placedwithin the space to be ventilated. The casing has near the bottom an inlet opening 5, arranged in one of the walls exposed in the room or space to be ventilated, conveniently the front wall. This opening is controlled by a suitable valve device, shown as taking the form of a swinging gate 6. There is a second inlet opening 7 in the lower part of the casing, this opening forming the outlet end of a suitthere is'mounted between the valve devices a lever 10 pivoted between its ends, each end being connected to one of the valve devices by a suitable connecting rod or link, as indicated at 11 and 12. When the lever is in the position shown in Fig.2, the inlet opening 5 is closed and the opening 6 is open, so that all of the air that is being put in circulation by the unit is drawn from an outside source. If the lever is swung in the clockwisedirection, the valve device 9 begins to close and the de-' vice 6 to open; thus permitting some of the air tobe drawn from the room and the remaining air to be brought in from the outside. The proportion between the incoming room air and the incoming outside air may be varied as desired. When the lever has been swun far enough to close the opening or port the valve device 6 will be in its full open position, so that all of the air will be drawn by the unit from the room.

The pivot for the lever 10 may conveniently be a shaft 13 to which the lever is fixed, this shaft extending to the exterior of the casing and being there provided with an operating handle 14: having associated therewith a stationary segment 15 or other suitable means for permitting the handle to be locked in any an lar position.

11 some cases it is desirable to temper the incoming outside air, so that it will not reach the blower in a cold condition. For this purpose-the conduit 8 may take the form of a compartment of the casing, extending from the top to the bottom on the rear side of the casing; such compartment having an inlet 16 at the top. Within this compartment is arranged a radiator 17 in the path of outside air flowing down to the inlet port or opening 7; causing the cold air to become more or less heated before it reaches the blower.

In Figures 4 and 5 of the drawings, there is illustrated a different form of unit that will permit room air, outside air,or a mixture of the same in any desired proportions, to be delivered by the unit. In this construction, as shown, there are in the bottom of the casing 20 two double blowers 21 and 22 spaced apart from each other and driven by a suitable motor 23 arranged between the same. Outside air is taken through a central port or opening 24 in the rear wall of the casing, entering the right hand half of the left hand blower, and the left hand half of the right hand blower. In the end walls of the casing are ports or openings 25 and 26 through which room air may enter the extreme left hand and right hand sections of the blowers. The port or opening 24 is controlled by a suitable valve device 27 having an operating handle 28 extending to the front side of the unit; and the ports or openings 25 and 26 are controlled by valve devices 28 and 29 respectively. In this construction one-half of the blower capacity is available for drawing outside air through the port 24, While the other half may be utilized to re-circulate room air drawn in through the ports 25 and 26. By adjusting the valve devices, the air delivered by the unit may be all outside air, all re-circulated room air, or a desired mixture of outside air and room air. Any suitable air heating means may be disposed within the casing above the-blowers as indicated at 40.

It is sometimes desirable to provide in the same unit both power and gravity circulating means. Such a construction is illustrated in Fig. 6, in which the casing 30 is divided into two compartments, a large compartment 31 and a small compartment 32, by a vertical partition 33. Any suitable air heating and air circulating means may be disposed within the large compartment. For example, this part of the unit may correspond to the unit shown in Figs. 13; there being a blower 41 and a heater 42. In the small compartment there is a radiator 34 through which flows air drawn into a suitable inlet opening 35 near the bottom of the compartment. The air from both compartments leaves the unit through the outlet 36 at the top. The inlet 35 may be controlled by an adjustable valve device 37 that may be locked in any desired position.

While I have illustrated and described with particularity only a single preferred form of my invention, with a few modifications, I do not desire to be limited to the exact structural details thus illustrated and described but intend to cover all forms and arrangements which come within the definitions of my invention constituting the appended claims.

I claim 1. In an air heatin and circulating unit,

a casing having an i et for room air and an inlet for outside air, airhcating means in the casing, and separate means for driving past said heating means the 'air entering said inlets.

2. In an apparatus of the character described, a casing, a double hlowcrin the bottom of the casing, there being outlets at the top of the casing, and means for delivering room air to one of the blowers and outside air to the other of the blowers in any desired proportions.

3. In an air circulating unit, a casing having an outlet and separate inlets for room air and outside air, means in the casing for driving the air entering the inlets through said' outlet, and means for keeping apart from each other the stream of air entering the inlet for room air and the stream of air entering the inlet for outside air until said streams reach the means for driving the air through-the outlet.

4. In an air heating and circulating unit, a casing having an outlet and separate inlets for room air and outside air, air heating means in the casing, blower means in the casing in position to drive air past said heating means and through said outlet, and means to prevent mingling of the incoming room air and the incoming outside air until after they reach said blower means.

In testimony whereof, I sign this specification.

HARRY W. PAGE. 

